Moonless Hunter

Deathly Origins. Can be turned and damaged by holy water as Undead.

Magic Resistance. Advantage: spell/magic effect saves.

Nightmare Leap. Once on its turn can use half its move to step magically into dreams of sleeping creature within 5 ft. of it. Emerges from dreams of another sleeper within 1 mile of 1st appearing in unoccupied space within 5 ft. of 2nd. Each sleeper suffers a level of exhaustion as nightmares prevent restful sleep (DC 14 Wis negates). Creature that fails save by 5+ also suffers long-term madness.

Spider Climb. Difficult surfaces even ceilings no ability check.

Sunlight Sensitivity. In sunlight disadvantage on attacks and Wis (Perception) checks that use sight.

Multiattack. Briny Embrace if it has a creature grappled. Then two Claws or one Bite and one Claw.

Bite. Melee Weapon Attack: +6 to hit, 5 ft., one target, 13 (2d8+4) piercing damage.

Claw. Melee Weapon Attack: +6 to hit, 5 ft., one target, 11 (2d6+4) slashing damage and target is grappled (escape DC 14). It has two claws each of which can grapple only one target.

Briny Embrace. Fills lungs of a creature grappled by it with seawater. Creature: DC 14 Con save or begin suffocating. A suffocating but conscious creature can re-save at end of each of its turns success ends effect on itself. Effect also ends if creature escapes grapple.

Whispered Terrors (Recharge 5-6). Bombards the minds of up to 3 creatures it can see within 60' of it with nightmares: 18 (4d8) psychic and frightened until end of its next turn (DC 14 Wis half not frightened). If creature fails by 5+ also suffers short-term madness.